Results 61 to 70 of about 1,961,603 (303)

From Photoalignment to Structured Light: Liquid Crystal Platforms for Beam Shaping and Complex Wavefronts

Advanced Functional Materials, EarlyView.
Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou, Tingjun Zhong, Sijie Liu, Pouya Nosratkhah, Ke Xu, Yuzhen Zhao, Kristiaan Neyts   +6 more
wiley   +1 more source

STUDY MINERAL COLUMBITE- TANTALITE WITH METALLURGICAL APPROACH TO DEFINE THE USE OF SAND DEPOSITS WITH HEAVY MINERALS

Avances en Ciencias e Ingeniería, 2016
The aim of this work was to study a sample of sand from a site of Bolivia, in order to obtain a pre-concentrate high grade Nb-Ta. Particle size analysis was performed and quantified in each class the chemical composition of Nb and Ta.
Graciela A. Castro, Andrea A. Díaz
doaj  

A Feasibility Study Evaluating the Efficiency of Fine Coal Washing Using Gravity Separation Methods

ARCHive-SR, 2019
Coal mining and washing activities in South Africa often lead to the generation of fine and ultra-fine coal which is in most cases discarded due to high handling and transportation costs.
Agnes Modiga, Ndabenhle Sosibo, Nirdesh Singh, Getrude Marape   +3 more
doaj   +1 more source

A Novel Modified Petroresin Particle (MPRP) With Enhanced Oil–Water Selectivity for Cold Production in Heavy Oil Reservoirs

Advanced Functional Materials, EarlyView.
A novel oil–water selective conformance control agent, MPRP, is prepared via hydrophilic grafting and mechanical granulation. MPRP uniformly disperses in water, cohesively expands upon aging, and readily dissolves in the oil phase. During conformance control, it selectively aggregates in water channeling pathways to form effective plugs without ...
Guang Zhao, Dongfang Lv, Chang Liu, Changxu Wu, Yifei Liu, Caili Dai, Huazhou Li   +6 more
wiley   +1 more source

Increasing Inter‐Micellar Connectivity Toughens and Imparts Cooling‐Induced Shape Memory in Micellar Hydrogels

Advanced Functional Materials, EarlyView.
Oligomerizing Pluronic triblock copolymers provides a processing strategy for tuning the mechanical properties and stimuli‐responsive behaviors of micellar hydrogels. Varying oligomer fraction produces hydrogels spanning brittle to highly extensible responses; maintaining micellar architectures enables cooling‐induced reverse thermal shape memory and ...
Gourav Kumbhojkar, Eric Yang, Arman Moussavi, EunBi Oh, Haeji Kim, Wei Chen, Junsoo Kim, Sinan Keten, Ryan L. Truby   +8 more
wiley   +1 more source

Phase separation in a gravity field

Discrete and Continuous Dynamical Systems - S, 2011
We prove here well-posedness and convergence to equilibria for the solution trajectories associated to a model for solidification of a liquid content of a rigid container in a gravity field. We observe that the gravity effects, which can be neglected without considerable changes of the process on finite time intervals, have a substantial influence on ...
P. Krejci, E. Rocca, J. Sprekels
openaire   +4 more sources

A mineralogical investigation into the pre-concentration of the Nechalacho deposit by gravity separation

Minerals Engineering, 2018
The Nechalacho rare earth element (REE) deposit is located in the Northwest Territories, Canada. Of the various REE-bearing minerals in the deposit, zircon is significant due to its elevated heavy rare earth element (HREE) content. Most studies performed
C. Marion, T. Grammatikopoulos, S. Rudinsky, R. Langlois, Hillary G Williams, P. Chu, Muhammad Awais, R. Gauvin, N. Rowson, K. Waters   +9 more
semanticscholar   +1 more source

Make‐Use‐Remake: Toward Indefinite Low‐Temperature Material Loops

Advanced Functional Materials, EarlyView.
We introduce a regenerable materials platform built from microparticles bound by a temperature‐responsive polymer shell, enabling strong, processable structures from diverse feedstocks. The material is shaped at low temperatures (80°C) using common manufacturing methods and reprocessed repeatedly in the presence of water, demonstrating stable ...
Nikola Křivánková, Wouter van der Wijngaart, Ulrica Edlund   +2 more
wiley   +1 more source

Wearable Kirigami‐Apertured Capacitive Sensors for Continuous Cardiac Volumetric Monitoring

Advanced Functional Materials, EarlyView.
A wearable kirigami‐apertured carbon nanotube‐paper composite (K‐CPC) capacitive sensor enables cardiac volumetric monitoring. The kirigami process creates a central aperture with cantilevered fibers that confine the electric field, enhancing both sensitivity and lateral resolution.
Yu‐Jen Cheng, Shawn Kim, Jonathan Avery, Younghoon Kwon, Jae‐Hyun Chung   +4 more
wiley   +1 more source

Exploring the Recovery Potential of Critical and Strategic Raw Materials from Traversella Mine (Piedmont, Italy) Waste: A Comparison of Laboratory-Scale Separation Techniques

Mining
The growing demand for green and, therefore, sustainable technologies present new challenges for our society. The European Union (EU) identified the critical raw materials (CRMs) and strategic raw materials (SRMs) necessary for these technologies and ...
Gabriele Baldassarre, Camila Mori De Oliveira, Adriano Fiorucci, Rossana Bellopede, Paola Marini   +4 more
doaj   +1 more source